xref: /linux/drivers/net/ethernet/sfc/efx.h (revision b889fcf63cb62e7fdb7816565e28f44dbe4a76a5)
1 /****************************************************************************
2  * Driver for Solarflare Solarstorm network controllers and boards
3  * Copyright 2005-2006 Fen Systems Ltd.
4  * Copyright 2006-2010 Solarflare Communications Inc.
5  *
6  * This program is free software; you can redistribute it and/or modify it
7  * under the terms of the GNU General Public License version 2 as published
8  * by the Free Software Foundation, incorporated herein by reference.
9  */
10 
11 #ifndef EFX_EFX_H
12 #define EFX_EFX_H
13 
14 #include "net_driver.h"
15 #include "filter.h"
16 
17 /* Solarstorm controllers use BAR 0 for I/O space and BAR 2(&3) for memory */
18 #define EFX_MEM_BAR 2
19 
20 /* TX */
21 extern int efx_probe_tx_queue(struct efx_tx_queue *tx_queue);
22 extern void efx_remove_tx_queue(struct efx_tx_queue *tx_queue);
23 extern void efx_init_tx_queue(struct efx_tx_queue *tx_queue);
24 extern void efx_init_tx_queue_core_txq(struct efx_tx_queue *tx_queue);
25 extern void efx_fini_tx_queue(struct efx_tx_queue *tx_queue);
26 extern void efx_release_tx_buffers(struct efx_tx_queue *tx_queue);
27 extern netdev_tx_t
28 efx_hard_start_xmit(struct sk_buff *skb, struct net_device *net_dev);
29 extern netdev_tx_t
30 efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb);
31 extern void efx_xmit_done(struct efx_tx_queue *tx_queue, unsigned int index);
32 extern int efx_setup_tc(struct net_device *net_dev, u8 num_tc);
33 extern unsigned int efx_tx_max_skb_descs(struct efx_nic *efx);
34 
35 /* RX */
36 extern int efx_probe_rx_queue(struct efx_rx_queue *rx_queue);
37 extern void efx_remove_rx_queue(struct efx_rx_queue *rx_queue);
38 extern void efx_init_rx_queue(struct efx_rx_queue *rx_queue);
39 extern void efx_fini_rx_queue(struct efx_rx_queue *rx_queue);
40 extern void efx_rx_strategy(struct efx_channel *channel);
41 extern void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue);
42 extern void efx_rx_slow_fill(unsigned long context);
43 extern void __efx_rx_packet(struct efx_channel *channel,
44 			    struct efx_rx_buffer *rx_buf);
45 extern void efx_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index,
46 			  unsigned int len, u16 flags);
47 extern void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
48 
49 #define EFX_MAX_DMAQ_SIZE 4096UL
50 #define EFX_DEFAULT_DMAQ_SIZE 1024UL
51 #define EFX_MIN_DMAQ_SIZE 512UL
52 
53 #define EFX_MAX_EVQ_SIZE 16384UL
54 #define EFX_MIN_EVQ_SIZE 512UL
55 
56 /* Maximum number of TCP segments we support for soft-TSO */
57 #define EFX_TSO_MAX_SEGS	100
58 
59 /* The smallest [rt]xq_entries that the driver supports.  RX minimum
60  * is a bit arbitrary.  For TX, we must have space for at least 2
61  * TSO skbs.
62  */
63 #define EFX_RXQ_MIN_ENT		128U
64 #define EFX_TXQ_MIN_ENT(efx)	(2 * efx_tx_max_skb_descs(efx))
65 
66 /* Filters */
67 extern int efx_probe_filters(struct efx_nic *efx);
68 extern void efx_restore_filters(struct efx_nic *efx);
69 extern void efx_remove_filters(struct efx_nic *efx);
70 extern s32 efx_filter_insert_filter(struct efx_nic *efx,
71 				    struct efx_filter_spec *spec,
72 				    bool replace);
73 extern int efx_filter_remove_id_safe(struct efx_nic *efx,
74 				     enum efx_filter_priority priority,
75 				     u32 filter_id);
76 extern int efx_filter_get_filter_safe(struct efx_nic *efx,
77 				      enum efx_filter_priority priority,
78 				      u32 filter_id, struct efx_filter_spec *);
79 extern void efx_filter_clear_rx(struct efx_nic *efx,
80 				enum efx_filter_priority priority);
81 extern u32 efx_filter_count_rx_used(struct efx_nic *efx,
82 				    enum efx_filter_priority priority);
83 extern u32 efx_filter_get_rx_id_limit(struct efx_nic *efx);
84 extern s32 efx_filter_get_rx_ids(struct efx_nic *efx,
85 				 enum efx_filter_priority priority,
86 				 u32 *buf, u32 size);
87 #ifdef CONFIG_RFS_ACCEL
88 extern int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb,
89 			  u16 rxq_index, u32 flow_id);
90 extern bool __efx_filter_rfs_expire(struct efx_nic *efx, unsigned quota);
91 static inline void efx_filter_rfs_expire(struct efx_channel *channel)
92 {
93 	if (channel->rfs_filters_added >= 60 &&
94 	    __efx_filter_rfs_expire(channel->efx, 100))
95 		channel->rfs_filters_added -= 60;
96 }
97 #define efx_filter_rfs_enabled() 1
98 #else
99 static inline void efx_filter_rfs_expire(struct efx_channel *channel) {}
100 #define efx_filter_rfs_enabled() 0
101 #endif
102 
103 /* Channels */
104 extern int efx_channel_dummy_op_int(struct efx_channel *channel);
105 extern void efx_channel_dummy_op_void(struct efx_channel *channel);
106 extern void efx_process_channel_now(struct efx_channel *channel);
107 extern int
108 efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries);
109 
110 /* Ports */
111 extern int efx_reconfigure_port(struct efx_nic *efx);
112 extern int __efx_reconfigure_port(struct efx_nic *efx);
113 
114 /* Ethtool support */
115 extern const struct ethtool_ops efx_ethtool_ops;
116 
117 /* Reset handling */
118 extern int efx_reset(struct efx_nic *efx, enum reset_type method);
119 extern void efx_reset_down(struct efx_nic *efx, enum reset_type method);
120 extern int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok);
121 
122 /* Global */
123 extern void efx_schedule_reset(struct efx_nic *efx, enum reset_type type);
124 extern int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,
125 				   unsigned int rx_usecs, bool rx_adaptive,
126 				   bool rx_may_override_tx);
127 extern void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs,
128 				   unsigned int *rx_usecs, bool *rx_adaptive);
129 
130 /* Dummy PHY ops for PHY drivers */
131 extern int efx_port_dummy_op_int(struct efx_nic *efx);
132 extern void efx_port_dummy_op_void(struct efx_nic *efx);
133 
134 
135 /* MTD */
136 #ifdef CONFIG_SFC_MTD
137 extern int efx_mtd_probe(struct efx_nic *efx);
138 extern void efx_mtd_rename(struct efx_nic *efx);
139 extern void efx_mtd_remove(struct efx_nic *efx);
140 #else
141 static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; }
142 static inline void efx_mtd_rename(struct efx_nic *efx) {}
143 static inline void efx_mtd_remove(struct efx_nic *efx) {}
144 #endif
145 
146 static inline void efx_schedule_channel(struct efx_channel *channel)
147 {
148 	netif_vdbg(channel->efx, intr, channel->efx->net_dev,
149 		   "channel %d scheduling NAPI poll on CPU%d\n",
150 		   channel->channel, raw_smp_processor_id());
151 	channel->work_pending = true;
152 
153 	napi_schedule(&channel->napi_str);
154 }
155 
156 static inline void efx_schedule_channel_irq(struct efx_channel *channel)
157 {
158 	channel->event_test_cpu = raw_smp_processor_id();
159 	efx_schedule_channel(channel);
160 }
161 
162 extern void efx_link_status_changed(struct efx_nic *efx);
163 extern void efx_link_set_advertising(struct efx_nic *efx, u32);
164 extern void efx_link_set_wanted_fc(struct efx_nic *efx, u8);
165 
166 static inline void efx_device_detach_sync(struct efx_nic *efx)
167 {
168 	struct net_device *dev = efx->net_dev;
169 
170 	/* Lock/freeze all TX queues so that we can be sure the
171 	 * TX scheduler is stopped when we're done and before
172 	 * netif_device_present() becomes false.
173 	 */
174 	netif_tx_lock(dev);
175 	netif_device_detach(dev);
176 	netif_tx_unlock(dev);
177 }
178 
179 #endif /* EFX_EFX_H */
180